Define _POSIX_VERSION correctly when older POSIX versions are selected.

(cherry picked from commit c6b6723e6b756d36d9912a1c430459634e15758b)

diff --git a/ChangeLog b/ChangeLog
index 24291eb3982425abbe0bac5432671024ea512891..6b574a5af94987473feaef7fff10f66122dbead0 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-08-23  Ulrich Drepper  <drepper@redhat.com>
+
+       * posix/unistd.h: Define _POSIX_VERSION correctly if older POSIX
+       versions are selected.
+
 2009-08-10  SUGIOKA Toshinobu  <sugioka@itonet.co.jp>
 
        * stdlib/longlong.h [__sh__] (udiv_qrnnd, sub_ddmmss): Add "t" to

diff --git a/posix/unistd.h b/posix/unistd.h
index 24ec74e05ea415d4ba5434a249d3e442466186f9..6f92c250ba44a7f4e9fba10b062fd1b4e6c0bde4 100644 (file)
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -30,8 +30,22 @@ __BEGIN_DECLS
 /* These may be used to determine what facilities are present at compile time.
    Their values can be obtained at run time from `sysconf'.  */
 
+#ifdef __USE_XOPEN2K8
 /* POSIX Standard approved as ISO/IEC 9945-1 as of September 2008.  */
-#define        _POSIX_VERSION  200809L
+# define _POSIX_VERSION        200809L
+#elif defined __USE_XOPEN2K
+/* POSIX Standard approved as ISO/IEC 9945-1 as of December 2001.  */
+# define _POSIX_VERSION        200112L
+#elif defined __USE_POSIX199506
+/* POSIX Standard approved as ISO/IEC 9945-1 as of June 1995.  */
+# define _POSIX_VERSION        199506L
+#elif defined __USE_POSIX199309
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1993.  */
+# define _POSIX_VERSION        199309L
+#else
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1990.  */
+# define _POSIX_VERSION        199009L
+#endif
 
 /* These are not #ifdef __USE_POSIX2 because they are
    in the theoretically application-owned namespace.  */